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noun
An animal whose body temperature varies with the temperature of its surroundings; any animal except birds and mammals.
synonym: ectotherm.
is a specific kind of: animal, animate being, beast, brute, creature, fauna.
derivation: ectothermic, heterothermic, poikilothermic, poikilothermous.
Find more on poikilotherm elsewhere: etymology - rhymes - Wikipedia.
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